23400451 has 2 divisors, whose sum is σ = 23400452. Its totient is φ = 23400450.

The previous prime is 23400427. The next prime is 23400469. The reversal of 23400451 is 15400432.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23400451 - 2¹⁹ = 22876163 is a prime.

It is a super-2 number, since 2×23400451² = 1095162214006802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23400851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11700225 + 11700226.

It is an arithmetic number, because the mean of its divisors is an integer number (11700226).

Almost surely, 2^23400451 is an apocalyptic number.

23400451 is a deficient number, since it is larger than the sum of its proper divisors (1).

23400451 is an equidigital number, since it uses as much as digits as its factorization.

23400451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 23400451 is about 4837.4012651423. The cubic root of 23400451 is about 286.0276881600.

Subtracting from 23400451 its sum of digits (19), we obtain a palindrome (23400432).

Adding to 23400451 its reverse (15400432), we get a palindrome (38800883).

The spelling of 23400451 in words is "twenty-three million, four hundred thousand, four hundred fifty-one".